The openings are not well suited for the wider champagne/sparkling wine bottles. This includes the front opening when trying to slide the bottle in and on the rear grooves, which are well suited for regular straight sided wine bottles, but not the flared champagne bottles. While I could barely slide a bottle in on one row, it just wound fit on the others without lifting the row above. Due to the spacing in the back grooves I can only put a bottle every-other space or have them not properly seated. As for the bamboo construction, it is nice and strict. Easy to assemble.